Railway truck



Feb. 20, 1940. R. G. ANDESON 2,190,763.

RAILWAY TRUCK Original Filed Dec. l5, 1957 N mi Inventor:

Robert @.And Tson, b #my 38 96 a( 6.4' v F8938 y His Attorrjey.

Yend of the axles.

Withspring seats 13 on which a plurality of coil" Patented Feb. gl), 1940.

RAILWAY TRUCK Robert-G. Amiel-son,y Erie, Pa., assign to ceneral Electric Company, a corporation o! New York Original application December 15, 1937, Serial No.

179,907. 'Divided and this `application August 28, 1939, Serial No. 292,310

6 Claims. (Cl. 10S-190) 4 My invention relates totrucks` for railway ve- 'hicles An object of my invention is to provide an improved railway truck providing a'exible resilient support for the balanced vertical loads and providing a resilient mechanism for equalizing the load transversely of the sides of the truck for restraining transverse tilting thereof.

Further objects and advantages of my invention will become `apparent and my invention will be better understood from the following description referring to the accompanying drawing, and the features of novelty which characterize my invention.wi1l be pointed out with particularity in the claims annexed to and forming part of this specification, 'I'his application is a division of my copending application Serial No. 179,907, filed December 15, 1937, and assigned to the sam assignee as this application.

In the drawing, Fig. 1 is a side elevational view of a truck embodying my invention; Fig. 2 is a fragmentary plan View of the truck-illustrated in Fig 1; Fig. 3 is a sectional view taken along line 3 3 of the truck shown in Fig. 2; Fig. 4 is a sectional view taken along line 4--4 of'the truck shown in Fig. 2; and Fig. 5 is asectional view taken along line 5-.5of Fig. 2.

Referring to the drawing,lin Figs. 1 and 2 I have shown a truckior arailway vehicle having a pair of axles 69 supported by Wheels l0 and arranged to support longitudinally extending equalizers 12 on journal boxes 1| mounted on each The equalizers 12 are provided springs 14 is mounted and is arranged to support resiliently the vertical load of the truck frame. The upper ends of these 'coil springs I4 engage spring seats 'l5 secured to the under side of side frames 16 of the truck frame, and these side frames 1B are provided with pedestal jaws T1 and pedestal shoes 18, which slidablynengage the sides of the journal boxes 1|. The truck frame is provided with end frames 19 arranged torigidly secure together'the Vends of the truck side frames 16 at each end of the truck, and a pair of transoms lBil is arranged in longitudinally spaced-apart versey' extending semi-elliptic leaf springs 84 arranged on each side of the bolster 8| and provided with spring straps 85 engaging bearings 8B formed-on the under side of the bolster 8| adjacent the longitudinal center thereof, as shown in Figs. 4 and 5. 'I'he ends 81 of the semi-elliptic springs 84 are supported on the truck frame by longitudinally extendingequalizer bars 88, which are mounted at each end thereof in slots formed in the lower ends ofupwardly extending supporting links 89. These swing or supporting links 89 are pivotally supported at the upper ends thereof by pivot pins 90 pivotally mounted in bearings 9| formed on the transoms 80 adjacent the side frames 16. In this manner, only the balanced vertical forces acting upon the swing bolster 8l are transmitted to the truckframe through the pivotally mounted resilient semi-elliptic springs 84, as only the forces acting on the central portion of the swing bolster 8| are transmitted through the bearing 86 and the spring 84 to the truck frame. This permits the use of a more resilient spring and provides easier riding qualities to the truck frame than can be obtained if the swing bolster is supported by a resilient arrangement which carries the normal balanced vertical load and also provides a resilient restraint against tilting of the truck.

In order to provide for transverse tilting and shocks withresilient restraint against excessive transverse tilting of theltruck, I provide a restraining. interconnected link mechanism extending between the sides of the truck frame and ar ranged to equalize the load on both sides of the truck. The interconnected link mechanism includes two lcomplementary sections provided with transversely extending equalizer links 92 and 93 pivotally secured intermediatel the ends thereof byA pivot pins 94 to downwardly extending brackets 95 formed on the under side of the swing bolster 8|, link mechanism are secured together at the lower ends thereof by a tie bar 96 bolted thereto by bolts 91. The inner ends of the equalizer links 92 and 93 are pivotally and slidably connected together by a lost-motion connection including 'a socket 98 formed on the end of the link 92 and circular segments 99 rotatably vmounted therein. The segment 99 is provided with a rectangular central opening I 00 formed therein, and the inner end I0| of the equalizer link 93 is formed in a rectangular shape and slidably engages the-opening |00 between the circular segments 99, and thereby provides apivotal and slidable lost-motion connection between the inner ends of the links 92 and 93. The outer ends of the links 92 and 93 are pivotally secured by pivot pins |02 to the lower i ends of upwardly extending links including socket .links |03, which are threadedly secured to bolts |04. The bolts I 04 and socket links |03 extend through openings formed in the lower ends |05 oi' casings |06 secured to ears |0'I' which are pivotally supported by pivot pins |08 on brackets |09 rigidly secured to the side frames 'I6 of the truck frame. 'Ihe lower ends |05 of the casings |06 and tapered sides I|0 at the upper ends, of the caslngs |06 provide stops for oppositely disposed axially movable spring seats III and ||2 arranged adjacent the upper and lower ends of the casings |06 and biased apart by coil sprlngsf||3 arranged within the casings |06 and about the shank of the bolt |04. In vthis manner, the coil springs ||3 are retained under compression between the spring seats I I I and I2 and bias the upper spring .seat I I I against the under side of the head of the, bolt |04 of the lower spring seat ,I I2 against the lower end |05 of the casing |06.,

If the loading on the two sides of the truck is not equal, the unbalanced vertical force acting on the truck frame will tend to produce a transverse tilting of the frame. Such tilting of the vframe causes the casing |06 on the side of `the frame which is tilted downwardly to move in a downward direction with the result that a downward force is transmitted to the pivot pin |02 -which tends to pivot the equalizer link on this side of the truck and causes the inner end oi' this equalizer link to move in an upward direction. vThis upward movement of the inner end of the equalizer link on the lower side of the trucktends to move the inner end of the equalizer link on the other side -of the truck in an upward direction which tends to pivot this other equalizer link about its pivot pin 94 and tends to lower the pivot pin on the outer end of this other link, and thereby moves the bolt |04 and the spring seat I I on this other side of the truck frame in a downward direction. This tends to compress the spring I I3 between the spring seats IiI and ||2 respectively and transmits a downward force through the spring seat ||2 to the lower end |05 of the casing |06 and through the pivot pin I 08 and the bracket |09 tothe side frame I6 on the other side of the "truck, and thereby tends .to lower this other side of the truck, thereby restraining the transverse tilting of thel truck by transmitting part of the unbalanced vertical force transversely oi.' the truck so as to equalize the loading on thetwo sides of thetruck.

Any balanced vertical loads on the truck are not transmitted through this interconnected link mechanism, as the casings on both sides of the truck tend to move in the same direction and the equalizer links on each side of the truck tend to pivot in the same direction, and thereby do not transmit any forces between the two sections of the link mechanism on the two sides of the truck. p Furthermore, if unbalanced vertical forces are transmitted to the swing bolster 6I through one" compressing this spring and transmitting the force throughthe spring seat I|2 to the casing |06 and to the side frame-16 on the side of the truck adjacent the side bearing 83 to which the unbalanced vertical force was applied. This downward movement of the pivot pin 94 on this side .of the swing bolster also tends to move in a downward direction the inner end of the equalizer link on this side ofthe truck, and this tends to move in a downward direction the inner end oi the equalizer link on the other side of the truck and causes this equalizer link to pivot about its pivot pin 94. This tendency of this equalizer link to pivot about'its pivot pin 94 causes the pivot pin |02 at the outer end of this equalizer link to move in an upward direction, so as to move upwardly the lower spring seat ||2 and compress the spring II3 on this side of the truck between the spring seat 2 and spring seat III, as the spring seat is prevented from moving upwardly by engagementfwith the tapered portions IIO of the casing |06 and engagement with the lower edge of the ears |01. Thus, the part oi the unbalanced force which is transmitted to the coil spring I I3 on this other side vof the truck is resisted by the relatively stationary pivot pin |06 which pivotally secures the casing 06 to the bracket |09 and 'the side frame 16 on this other side oi' the truck, and an opposite reaction force is transmitted from this pivot pin |08 on this other side oi' the truck through the compression spring II3, to the lower spring seat I|2, to the shoulder on the socket I 03 at the lower end of the bolt I 04, to the pivot pin |02 on the outer end of the equalizer link on this other side of the truck, and this reaction force resists upward movement of this outer end of the equalizer link.

In this manner, the'reaction force on this other side of the truck tends to prevent upward movement of the outer end of the equalizer link and the unbalanced force acting on the inner end oi!- this equalizer link through the downward movement of thel inner end of the equalizer link on the side of the truck to which the unbalanced force is applied both tend` to produce a downward movement of the equalizer link on this other side of the truck. This results in a downward force upon the pivot pin 94 intermediate the ends of this equalizer link on the other side of the truck, and tends to produce a downward movement thereof, thereby transmitting a downward force to this other side of the swing bolster and equalizing the unbalanced force on the two sides of the swing bolster, which tends to restrain. tilting of the equalizer bolster relative to the truck frame and equalizes the load on the two sides of the truck.

While Ihave illustrated and described a particular embodiment of my invention', modiiications thereof will occur to those vskilled in the art. I desire it to be understood, thereforejthat my invention is not to be limited to the particular arrangement disclosed, and I intend in thel appended claims to cover all modicatons which "do not depart from the spirit'and scope of my mechanism including a pair of links pivotally se- 7| vio cured at the outer ends thereof for resilient relative vertical movement to said truck frame and extending between the sides of said truck frame, the inner ends of said pivoted links being pivotally secured together by a lost-motion connection, and means for pivotally securing said links intermediate the ends thereof to said swing bolster.

2. A truck having a frame and including an element extending transversely between the sides of said frame, means for supporting said transversely extending element on said truck frame, means including a link mechanism including a -plurality of sections extending between each side of said frame for equalizing vertical forces on both sides of said truck transversely between said transversely extending element and saidtruck trame, each of said sections comprising a pair of opposltely disposed axially movable spring seats, a spring arranged to bias apart said pair of spring seats, stops pivotally secured to said frame and arranged to limit the outward movement of said spring seats, means extending between said spring seats engaging the outer side of said spring seats for transmitting forces through said spring seats to compress said spring, a link pivotally connected intermediate the ends thereof to said transversely extending element, means pivotally connecting the outer end' of said link to said force transmitting means, and means including a lost-motion connection for pivotally securing together the insides of said truck frame, a bolster arranged between said pair of transoms, means for resiliently supporting said bolster on said transoms, means including a link mechanism including two sections for equalizing vertical forces transversely between said bolster and said truck frame transversely of the two sides of said frame, each of said sections comprising a casing secured to said sides of said frame and a parir of axially movable spring seats arranged therein, a spring arranged to urge apart said pair of spring seats, means extending between and engaging said spring seats for transmitting forces through said spring seats to compress said spring, a link pivotally connected intermediate the ends thereof to said bolster, means pivotally connecting the outer end of said link to said force transmitting means, and means including a lost-motion connection for pivotally securing together the inner ends of said links of each of said sections.

4. A truck having wheels, axles supported by 'said wheels, equalizers extending between and supported by said axles, a truck frame having side trames, a pair of spaced apart transoms extending between and connecting said side frames, means for resiliently supporting said truck frame on said equalizers, a swing bolster arranged between said transoms, a plurality of swing links, each of said swing links being arranged adjacent a different end of a different one of said transoms and pivotally connected thereto, a pair of tie bars,

vcne of said tie bars being pivotally supported on each side of said truck on swing links at adjacent ends of different transoms, means including a pair of transversely extending springs pivotally supported on said tie bars and arranged to support resiliently said bolster for transmitting verti- -cal forces between said bolster and said transoms,

and means including an interconnected link mechanism arranged intermediate said transverse springs and extending between said side frames for equalizing the vertical forces transmitted between said bolsterand said truck frame to said resilient frame supporting'means, said link mechanism including links pivotally connected to said truck side frames and to said bolster, and means for providing a lost motion pivotal connection between the inner ends of said links.

5. A truck provided with a truck frame having side frames, a swing bolster extending transversely of said truck frame, swing links pivotally sup ported on opposite sides of said truck frame, means including transversely extending springs pivotally supported upon said swing links for resiliently supporting said bolster and for transmitting' vertical forces between said bolster and said truck frame, and means including an interconnected link mechanism arranged intermediate said transverse springs and extending between said side frames for equalizing the load on said side frames, said link mechanism including links pivotally connected to said ltruck side frames and to said bolster, and means for providing a lost motion pivotal connection between the inner ends of said links.

6. A truck having wheels, axles supported by said wheels, equalizers extending between and supported by said axles, a'truck frame Ahaving side frames, a pair of longitudinally spaced apart transorns extending between and connecting said side frames, means for resiliently supporting said truck frame on said equalizers, a swing bolster arranged between said transoms, a plurality of swing links arranged adjacent the ends of said transoms and pivotally connected thereto, means for supporting said swing bolster on said swing links for transmitting vertical forces between said bolster and said transoms and providing for relative lateral movement therebetween, a plurality of vertically extending transverse bearings arranged adjacent the ends of said transoms on the inner vertically extending side thereof, means including complementary side bearings adjacent each end of said swing bolster arranged to engage said transverse bearings for transmitting longitudinal forces between said bolster and said transoms, means including a link mechanism having a pair of links pivotally connected together at the inner ends thereof and connected at each outer end thereof to the adjacent side frame ofsaid truck vand having resilient elements arranged to transmit resiliently vertical forces in both directions on said links with respect to said truck frame for restraining tilting of said truck frame yand for equalizing the forces on eachside of said truck, 'and means for pivotally connecting each of said links intermediate the ends thereof to said swing bolster.

ROBERT G. .Al\l'DlitltS0N.l 

